A Sanskrit poem about Ramayana when read in reverse direction becomes a poem on Mahabharata!
For online education to succeed for smaller classses - it should be as interesting as cartoons. Online education cant succeed unless it is more interesting, interactive and innovative than offline schooling.
The difference between Planets and Grahas. Why are Sun and Moon included in the list of Navagrahas? Isn't it true that Rahu and Ketu do not exist? What about Earth?
The most important contribution of ancient India to mathematics was not zero but the place value system or positional notation system.